docs/mm: bootmem: fix kernel-doc warnings

Add descriptions of the return value where they were missing and fixup the
syntax for present ones.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
Mike Rapoport 2018-06-30 17:54:58 +03:00 • committed by Jonathan Corbet
commit 7c757207fa